496
cu. in. "STROKER" By JOSS
ENGINES

1983
GMC Sierra Classic

The
new engine dynoed at
629hp @
5900RPM
First time out 12.8 sec.
Then we added a new air gap intake and 1050 dominator.
Best time 12.3 @ 116mph (Not Sportsman Class Anymore)
We couldn't keep belts on the engine so we addedMarch
pulleys, electric water pump,
and electric fans.
Should have a few more ponies